get globalDatabaseAccountName from GlobalEndpointManager

sdk/cosmos/azure-cosmos/src/main/java/com/azure/cosmos/implementation/RxDocumentServiceRequest.java

@@ -1186,13 +1186,9 @@ public void setEffectivePartitionKey(String effectivePartitionKey) {
         this.effectivePartitionKey = effectivePartitionKey;
     }
 
-    public void setThinclientHeaders(String operationType, String resourceType, String regionalHost, String resourceId) {
+    public void setThinclientHeaders(String operationType, String resourceType, String globalDatabaseAccountName, String resourceId) {
         this.headers.put(HttpConstants.HttpHeaders.THINCLIENT_PROXY_OPERATION_TYPE, operationType);
         this.headers.put(HttpConstants.HttpHeaders.THINCLIENT_PROXY_RESOURCE_TYPE, resourceType);
-
-        String host = regionalHost.substring(0, regionalHost.indexOf("."));
-        int lastIndexOfHyphen = host.lastIndexOf("-");
-        String globalDatabaseAccountName = host.substring(0, lastIndexOfHyphen);
         this.headers.put(HttpConstants.HttpHeaders.GLOBAL_DATABASE_ACCOUNT_NAME, globalDatabaseAccountName);
         this.headers.put(WFConstants.BackendHeaders.COLLECTION_RID, resourceId);
     }

sdk/cosmos/azure-cosmos/src/main/java/com/azure/cosmos/implementation/ThinClientStoreModel.java

@@ -129,10 +129,11 @@ public StoreResponse unwrapToStoreResponse(RxDocumentServiceRequest request, int
     @Override
     public HttpRequest wrapInHttpRequest(RxDocumentServiceRequest request, URI requestUri) throws Exception {
 
+        String globalDatabaseAccountName = this.globalEndpointManager.getLatestDatabaseAccount().getId();
         request.setThinclientHeaders(
             request.getOperationType().name(),
             request.getResourceType().name(),
-            requestUri.getHost(),
+            globalDatabaseAccountName,
             request.getResourceId());
 
         byte[] epk = request.getPartitionKeyInternal().getEffectivePartitionKeyBytes(request.getPartitionKeyInternal(), request.getPartitionKeyDefinition());